真空度太小 的英文怎麼說

中文拼音 [zhēnkōngdùtàixiǎo]
真空度太小 英文
the pressure in the vacuum is too low
  • 真 : Ⅰ形容詞（真實） true; genuine; real Ⅱ副詞1 （的確; 實在） really; truly; indeed 2 （清楚確實） cl...
  • 空 : 空Ⅰ形容詞（不包含什麼; 裏面沒有東西或沒有內容; 不切實際的） empty; hollow; void Ⅱ名詞1 （天空） s...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 太 : Ⅰ形容詞1 （極高; 極大） highest; greatest; remotest 2 （極; 最） extreme; most 3 （身分最高或輩分...
  • 小 : Ⅰ形容詞1 （體積、面積、數量、強度等不大） small; little; petty; minor 2 （年紀小的; 年幼的） youn...
  • 真空 : [物理學] vacuum; empty space; vacuo
  1. The latter measurements provide definitive evidence that mercury ' s magnetosphere ? despite its small size ? is not a vacuum but hosts significant densities of heated solar wind plasma

    後者測量提供確切的證據表明，水星的磁層-盡管它體積小-是不是一個真空，但東道主密度顯著激烈的太陽風等離子體。
  2. The length should be added if the cost is n ' t increased and the installation is convenient, the diameter should be chose by the local weather condition and the using requirement ; the gas pressure should be not higher than 5 x 10 - 2pa and the emissivity should be less than 0. 1, the spring should be small and narrow in order to decrease the heat loss, the gas absorbed getter should not be too many as long as it can absorb the residual gas and keep the vacuum degree

    在不影響安裝和增加成本的情況下，應適當增加太陽能真空集熱管的長度;根據當地的氣候條件和使用要求來綜合考慮選擇直徑;國標規定的真空度必須達到5x10 』 zpa ，發射率小於0 . 1是合理的;彈簧卡子不要選用很寬、很大的尺寸，盡量減少接觸熱損;吸氣劑並非越多越好，只要能夠吸收殘余氣體，保證一定的真空度即可。
  3. The bigger the diameter, the high the heat efficiency, but the weak the temperature increasing ability, length has less effect on the heat efficiency, tilt angle has less effect on the flow field and temperature field while it is larger than 30 degree, vacuum degree and emissivity have great effect on the flow field and temperature field while there is a great temperature difference between the liquid in the tube and the surroundings, the furring has less effect on the heat transfer but should be cleaned up in 3 - 5 years because of poor water quality, the higher the solar flux or the more the temperature difference between the liquid and the surrounding, the more the heat loss and the lower the heat efficiency

    分析了各種因素對太陽能真空集熱管流場和溫度場的影響。直徑越大，熱效率越高，但升溫能力弱；長度對熱效率影響不大；傾斜角度大於30后，自然對流已經能夠充分進行，考慮以能夠吸收到最大太陽輻射為主；真空度和發射率對熱效率和溫度場影響很大，尤其是在介質溫度與環境溫度差異比較大時；水垢對傳熱影響較小但由於水質的問題應該被3 5年清洗一次；太陽輻射強度越大，介質溫度與環境溫度差異越大，熱損失越大，效率越低； 4
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